A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The use of class-B and class-D amlifiers for converting digital audio signals to analog signals is discussed. It is shown that the class-D amplifier is unsuitable due to distortion. Therefore, a new principle involving a switch-mode power supply and a class-B amplifier is suggested. By regulating the supply voltage to the amplifier according to the amplitude of the audio signal, a higher efficiency than can be obtained by the current principles is achieved. The regulation can be done very efficiently by generating the control signal to the power supply in advance of the audio signal, made possible by the digital signal from the preamplifier. A prototype shows possibilities for further developments.
Original languageEnglish
Title of host publicationAudio Engineering Society Preprint : Presented at the 80th Convention
PublisherAudio Engineering Society
Publication date1986
Publication statusPublished - 1986
EventAES Convention - Montreux, Switzerland
Duration: 4 Mar 19867 Mar 1986
Conference number: 80

Conference

ConferenceAES Convention
Number80
CountrySwitzerland
CityMontreux
Period04/03/198607/03/1986

Bibliographical note

Paper Number:2346

Keywords

  • Amplifiers
  • Audio frequency
  • Amplifiers, power type
  • Electronic circuits
  • Power supply - applications
  • Audio equipment
  • Data conversion, digital to analog
  • High efficiency power audio amplifier
  • Digital preamplifier
  • Control of power supply
  • Conversion from digital to analog signal;
  • Switch-mode power supply

Cite this

Jensen, J. A. (1986). A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier. In Audio Engineering Society Preprint: Presented at the 80th Convention Audio Engineering Society.
Jensen, Jørgen Arendt. / A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier. Audio Engineering Society Preprint: Presented at the 80th Convention. Audio Engineering Society, 1986.
@inproceedings{fdd9a9e3f3f949bb926d4e3f1c080e22,
title = "A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier",
abstract = "The use of class-B and class-D amlifiers for converting digital audio signals to analog signals is discussed. It is shown that the class-D amplifier is unsuitable due to distortion. Therefore, a new principle involving a switch-mode power supply and a class-B amplifier is suggested. By regulating the supply voltage to the amplifier according to the amplitude of the audio signal, a higher efficiency than can be obtained by the current principles is achieved. The regulation can be done very efficiently by generating the control signal to the power supply in advance of the audio signal, made possible by the digital signal from the preamplifier. A prototype shows possibilities for further developments.",
keywords = "Amplifiers, Audio frequency, Amplifiers, power type, Electronic circuits, Power supply - applications, Audio equipment, Data conversion, digital to analog, High efficiency power audio amplifier, Digital preamplifier, Control of power supply, Conversion from digital to analog signal;, Switch-mode power supply",
author = "Jensen, {J{\o}rgen Arendt}",
note = "Paper Number:2346",
year = "1986",
language = "English",
booktitle = "Audio Engineering Society Preprint",
publisher = "Audio Engineering Society",

}

Jensen, JA 1986, A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier. in Audio Engineering Society Preprint: Presented at the 80th Convention. Audio Engineering Society, AES Convention , Montreux, Switzerland, 04/03/1986.

A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier. / Jensen, Jørgen Arendt.

Audio Engineering Society Preprint: Presented at the 80th Convention. Audio Engineering Society, 1986.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

TY - GEN

T1 - A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier

AU - Jensen, Jørgen Arendt

N1 - Paper Number:2346

PY - 1986

Y1 - 1986

N2 - The use of class-B and class-D amlifiers for converting digital audio signals to analog signals is discussed. It is shown that the class-D amplifier is unsuitable due to distortion. Therefore, a new principle involving a switch-mode power supply and a class-B amplifier is suggested. By regulating the supply voltage to the amplifier according to the amplitude of the audio signal, a higher efficiency than can be obtained by the current principles is achieved. The regulation can be done very efficiently by generating the control signal to the power supply in advance of the audio signal, made possible by the digital signal from the preamplifier. A prototype shows possibilities for further developments.

AB - The use of class-B and class-D amlifiers for converting digital audio signals to analog signals is discussed. It is shown that the class-D amplifier is unsuitable due to distortion. Therefore, a new principle involving a switch-mode power supply and a class-B amplifier is suggested. By regulating the supply voltage to the amplifier according to the amplitude of the audio signal, a higher efficiency than can be obtained by the current principles is achieved. The regulation can be done very efficiently by generating the control signal to the power supply in advance of the audio signal, made possible by the digital signal from the preamplifier. A prototype shows possibilities for further developments.

KW - Amplifiers

KW - Audio frequency

KW - Amplifiers, power type

KW - Electronic circuits

KW - Power supply - applications

KW - Audio equipment

KW - Data conversion, digital to analog

KW - High efficiency power audio amplifier

KW - Digital preamplifier

KW - Control of power supply

KW - Conversion from digital to analog signal;

KW - Switch-mode power supply

M3 - Article in proceedings

BT - Audio Engineering Society Preprint

PB - Audio Engineering Society

ER -

Jensen JA. A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier. In Audio Engineering Society Preprint: Presented at the 80th Convention. Audio Engineering Society. 1986